Butter an 8x8 glass baking dish and line with parchment paper. Set aside.

In a 2-quart microwave safe bowl, combine the chocolate chips and sweetened condensed milk.

Add the butter and microwave at 50% power for 1 minute.

Stir and microwave again at 50% power for 1 minute.

Continue stirring and microwaving at 50% power for 30 second intervals until everything is melted and smooth.

Stir in the Kahlúa Pumpkin Spice and spread into the prepared pan.

Refrigerate until firm, at least 3 hours, before cutting and serving.

Store in the refrigerator for up to 1 week.